Die for covering tubes.



E. JONES.

DIE r03 covzmm TUBES. 4 APPLICATION FILED MAE. 1, 1909. RENEWED FEB. 19, 1910. 95 1 0 3 Patented Apr. 5, 19M

2 $HEETB-$HEET 1.

ATTOR/VE V8 E. JONES.

DIE FOR COVERING TUBES. APPLICATION FILED MAR. 1, 1909. RENEWED FEB.19,1910.

Paten'tsfi 121111. 5, 1916.

'2 SHEETS-SHEET 2.

NIH B11705 1 (Ayn-ma.

WITNESSES r A..ii"iiifi i EDWARD JONES? 03 NEW] YORK. N. Y., ASSIGNOR TO EMANUEL 1mm TUBES.

UNITL STATES P \SAMUEL JACKSON, DOING BUSINESS AS THE FIR OF BROOKLYN, NEW YORK.

DIE FOR- COVERING atcnt.

Renewed February 19. 1910.

iGSSClliiilHY my invention guide A nmiinied :1, shortfrom :i system in? (i105 (i198 .iUlliPi'i 5 10in die i'ioiiml H shown 10 flies may be (30 um] the system of :nshion upon z The nioihoii of n'ioi'uii'in draw iKiHi] y usual mounted in 1111 bench.

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5 im in" 0, din pi i iiiiisii mi S i iiiiiiif-ii 1 in hos iiii opoiiii" SGCiJUii i .11 TM xi 0 a 1 i P in R 00 W0 the in (i at the top of the die is a downwardly projecting rib (Z the sides of which are practically parallel and curved outwardly above to unite with the inner surface of the die open ing. This rib may either be integrally a part of the die or preferably may be formed separately with a tapered dove-tail base so as to be removable and replaceable in case of breakage. Attached to the front of the die is a U shaped folder H having a lower finger e substantially perpendicular to the face of the die and extending through it to its rear surface. This finger has its lower surface 6" substantially horizontal and tlush with the lower surface of rib d. The surface 6 of the finger adjacent to the rib is downward as Z.

fiat while the third and remaining side is curved away from the inner surface of the die opening shown. The lower surface of the rib (Z as also the ilower surface (2 of the finger e is preferably tapered to the same degree as the die opening itself as is also the curved third side of the finger e.

In operation the dies A and guide A are set upon a bench, (not shown), and fixed thereto in any usual Way. A covering strip F, the width of which must be substantially that of the inner periphery of A between the groove bottoms a and b, is then slipped into and through the guide with the edges embraced by the grooves; if properly selected the strip will be able to move freely in the guide Without'any lateral play or, indeed, any movement longitudinally. As the strip issues from the inner end of the guide, its ends are clipped of? so that the strip may be carried clear through the four dies, without being operated upon substantially by the folder and tongue; the tube to be covered is then laid. in the guide upon the covering strip and also pushed through the dies, when the combined end ofwovering strip and tube may be gripped by any of the usual vise or tong arrangements preparatory to drawing the tube and cover through the dies. This drawing being begun, the far-edge of the st'r'ip (referring to Fig.1) is, as shown, carried out and between the two limbs e and j of the folder and over the finger 6 between said finger and the inner surface is of the, die where it will meet the rib (Z and be hunt The opposite edge of the covering strip is at the same time meeting the opposite side of the rib d and being turned downward at m, then across under the rib as n and finally up between the first turned edge and the finger as at 0. This is clearly brought out in Fig. 4, as also in Figs. 5, 6, and 7. This upturning of the last named edge 0 is assisted by the back curva ture of the inner or near groove 7/ of the guide as shown in Fig. 8.

The opening indie B is tapered toward the axis. from the front tothe rear face so that ,the folded joint, just described, is made thereof.

tighter as it passes through the die. Die C has the same preferably ovate outline of die B but lacks the rib. It is preferably countersunk so as to receive the partially covered tube easily, and it also tapers from front to rear, but is, of course, of smaller cross section than die 13. As the combined tube and cover passes through die C, therefore, the joint is flattened, the sides being bent in at f, g, and being oppositely bent at /i, 27. Fig. 5 shows this flattening just begun. Fig. 6 shows the condition of the joint when just fairly' entered in the die D and Fig. 7 shows the joint when practically finished and completely flattened. \Vhether the inner core tube becomes indented by the joint or whether the joint stands out slightly upon the finished tube, depends altogether upon the wall thickness of the core tube and upon whether the finishing dies are circular or slightly ovate in section. 1

The sha i11 of the inner ed e referrin b b b to' Fig. 1)' of strip lhlhat is, the shaping of the elements m, n, and 0, of the locked joint,

is greatly assistcd by the backward bending of the edge B of the guide as shown in Fig.

8. This backward bending gives the strip edge a tendency to'upturn which extends to aconsiderable distance beyond the inner end of the guide. I consider this an important feature of my invention.

Another important, feature of my invention resides in the use ofthe guide A and the setting of said guide with its axis and with the grooves a, b in definite relation to the axis of the dies and the rib and finger The guide and dies bein thus definitely fixed, the strip cover is ena led to move freely With relation to the dies except longitudinally, so that the locked joint is always the same for a definite length of tube to be covered and presents at no point any 1. In a device for forming a. lock jointed strip cover upon bodies of uniform external section, funnel shaped guide means in advance of lock jointingmeans, said guide means comprising a strip bent about its length to form an incomplete funnel the inner end of which nearly surrounds the 'body to becovered,'and having edges inwardly folded to form grooves to receive and guide the cover strip the peripheral disl tanee between the bottoms of said grooves being the same for the Whole length of the guide, substantially as and for, the purpose described. 7

2. In combination with a die for covering tubing with -a strip, tunnel shaped guide means in advance of and separated from said die, said guide means having an opening along its entire length and each edge of said opening being provided with strip limiting means, the peripheral distance between such limiting means being uniform through the length of the guide, substantially as and for the purpose described.

- In combination, for covering tube with a strip, a die having an ovate opening therethrongh, a centrally projecting rib at the apex'of said ovate, a finger passing entirely through the die and supported parallel with said rib but slightly separated therefrom and from the adjacent periphery of the die, j and a funnel form guide in advance of said die, said guide being adapted to prevent other than longitudinal movement of the strip and to shape; and locate said strip for entrance to the die,

t, In coinbinatio i, for forming a lock jointed strip cover npoif'tiibing, a die having an ovate opening therethrough, a cen trally projecting longitudinal rib at the apex of said ovate opening, a longitudinal i linger part; of the length of which lies with in the die parallel with, but slightly separated from, said rib and from the adjacent periphery of the die and the ren'iainingpart of the length of which projects forward of the die and within one end of a tunnel form guide, said guide having edges provided with limitii'ig means the axis of said guide and the angiilar positiorro't said guide edges being definitely related to the axis, rib, and linger of said die, substantially as and for the purpose. described.

5. in combination, .i'or forming a loelc i jointed strip cover upon tubing, a die having an ovate opening theretln'ough, a contrally projecting longitudinal rib at the apex of said ovate opening, a longitudinal linger parallel with but separated from said rib and the adjacent periphery of the die and projecting forwardly of the die, a funnel torni guide in advance of said die and inclosing the forwardly projecting portion ol? the finger said guide being provided with edges adapted to hold and bend the strip cover to enter said die, and an ovate finishing die behind said first named die, substantially as and tor the purpose described.

In testimony whereol 1 ha ve' hereunto set my hand in the presence o'l two subscribing wit: esses.

EDWARD JONES.

Witnesses Emma Gina YOUNG, Jenn A. Knnmmnnon. 

